I tow a travel trailer with my 2008 T4R V8. Around here in East Tennessee I can get about 12-13 mpg towing it. The trailer's gvwr is 4950 lbs. and I would estimate that fully loaded it weighs in at 4700-4800 lbs.

With all the hills and mountains around us more horsepower would be welcome. I've heard and read a little about cold air intakes and was wondering if one would make much of a difference in my 4R. I don't want to compromise longevity of the drivetrain. Anyone have one on their 4R? Would a CAI do the trick and what should I expect to gain from one? Is it worth it?

Thanks.